结构性土的微观变形和机理研究

Study on micro-deformation and mechanism of structural clay

提出点面接触单元,再通过更新的Lagrange大变形有限元法,对有限尺寸和任意方位的土粒骨架在VanDerWaals分子吸力、Coulomb电荷斥力和外荷载作用下的变形问题进行了跟踪分析,定量探索和分析了土体的变形、破坏、结构性和蠕变的内在机理,为建立结构性土的本构模型提供了微观基础.

On the basis of the pointsurface contact element and the updated Lagrange large strain FEM, a tracing analysis was made of the deformation of soil particle skeletons under the Van Der Waals attraction, the doublelayer repulsion and external loads, and the micromechanism of skeleton deformation, failure, structure, and creep was also discussed, providing a basis for development of constitutive models of structural soil.